资讯

A group of international researchers have developed a way to use sound to generate different types of wave patterns on the surface of water and use those patterns to precisely control and steer ...
Sound waves can reflect off surfaces ... High frequency ultrasound waves can be used to detect objects in deep water and to measure the depth of the sea. Ultrasound is reflected off an object ...
shows how an innovative and non-toxic process using ultrasonic sound waves can alter the surface of glass, making it either hydrophobic (water resistant) or electrically charged. Lead researcher ...
Water, sand, and carbon dioxide-based fire ... Using an air vortex cannon to focus the sound waves from the bass reflex port, it ‘wiggles’ the flame out in a matter of seconds, as illustrated ...
In the guest blog, physicist Andrea Navarro-Quezada shows the importance of sound waves for our everyday life and research. Almost all of us know the concept of a wave. It is a periodic motion or ...
“We call this technique wave-momentum shaping.” To implement their method, Fleury and colleagues generated sound waves at audible frequencies using an array of loudspeakers situated at either end of a ...
JFontan – stock.adobe.com Sound is more than just noise — it’s made up of mechanical waves that create tiny vibrations traveling through the air, water or even tissue. We’ve long known ...
It’s because space doesn’t carry sound in the way we experience it on Earth. There is no air or water to carry pressure waves that create audible sound. But that does not mean the universe is ...
A sound wave is a vibration that travels through a solid, liquid or gas such as the air or water. A loud sound has a large amplitude, a high pitched sound has a high frequency. Musicians and ...